http://bugzilla.kernel.org/show_bug.cgi?id=13918
Summary: Processor not throttled when overheating
Product: ACPI
Version: 2.5
Kernel Version: 2.6.31-rc5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Thermal
AssignedTo: acpi_power-ther...@kernel-bugs.osdl.org
ReportedBy: elen...@planet.nl
Regression: No
Created an attachment (id=22610)
--> (http://bugzilla.kernel.org/attachment.cgi?id=22610)
ACPI DSDT table
System: HP 2510p Core Duo notebook, x86_64 kernel; Debian stable ("Lenny")
Yesterday my notebook (HP 2510p Core Duo) shut down hard due to overheating
while compiling a kernel and running vlc.
Both processor cores continued to run at full speed until the system shut down.
IIUC the cores should get slowed down (T-state followed by P-state) before that
happens.
I was using the ondemand governor for frequency scaling.
One thing I noticed is that, although the cores are registered as cooling
devices, they are not bound to any thermal zones:
/sys/class/thermal$ grep . cooling_device*/type
cooling_device0/type:Fan
cooling_device1/type:Fan
cooling_device2/type:Fan
cooling_device3/type:Fan
cooling_device4/type:Fan
cooling_device5/type:Fan
cooling_device6/type:Fan
cooling_device7/type:Processor
cooling_device8/type:Processor
cooling_device9/type:LCD
/sys/class/thermal$ ls -1d thermal_zone*/cdev[0-9]
thermal_zone0/cdev0
thermal_zone0/cdev1
thermal_zone0/cdev2
thermal_zone0/cdev3
thermal_zone1/cdev0
thermal_zone1/cdev1
thermal_zone1/cdev2
thermal_zone1/cdev3
thermal_zone1/cdev4
thermal_zone1/cdev5
thermal_zone1/cdev6
thermal_zone3/cdev0
thermal_zone3/cdev1
thermal_zone4/cdev0
As you can see, cdev7 and cdev8 are not listed. But according to
Documentation/thermal/sysfs-api.txt, they should be listed "if the processor is
listed in _PSL method", and AFAICT in my dsdt that is the case for zones 0, 3,
4 and 6 (through method C3B4).
AFAICT all required modules are loaded (cpufreq_ondemand is compiled in):
cpufreq_conservative 7904 0
cpufreq_userspace 3604 0
cpufreq_stats 4808 0
cpufreq_powersave 1776 0
coretemp 6720 0
acpi_cpufreq 8096 0
processor 39960 3 acpi_cpufreq
thermal 16160 0
thermal_sys 16768 4 video,processor,thermal,fan
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